package main

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"io"
)

// App struct
type App struct {
	ctx   context.Context
	prism Prism
}

type Modpack struct {
	Name         string
	Nd           string
	Last_updated string
}

// NewApp creates a new App application struct
func NewApp() *App {
	return &App{}
}

// startup is called when the app starts. The context is saved
// so we can call the runtime methods
func (a *App) startup(ctx context.Context) {
	a.ctx = ctx
}

// Greet returns a greeting for the given name
func (a *App) Greet(name string) string {
	return fmt.Sprintf("Hello %s, It's show time!", name)
}

func (a *App) GetModpacks() []string {
	buff := new(bytes.Buffer)
	err := HttpDownload("modpacks.json", buff)
	if err != nil {
		fmt.Println(err)
	}
	body, err := io.ReadAll(buff)
	var modpacks []Modpack
	err = json.Unmarshal([]byte(body), &modpacks)
	if err != nil {
		fmt.Println(err.Error())
		return nil
	}
	var names []string
	for _, pack := range modpacks {
		names = append(names, pack.Name)
	}
	return names
}

func (a *App) CheckPrerequisites() {
	a.prism = Prism{}
	res := a.prism.CheckInstalled()
	fmt.Printf("Checking if prism is installed: ")
	if res {
		fmt.Println("Yes")
	} else {
		fmt.Println("No")
		fmt.Println("Installing Prism")
		a.prism.Install()
	}
}